Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef30ccb8c55a6867…

MALICIOUS

PDF

86.0 KB Created: 2021-06-26 17:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 99a893e1097eba8a3859926dbee36efd SHA-1: 3ea9c085b8258da75c51172e0b08e9f3ba8770d1 SHA-256: ef30ccb8c55a6867fb2d66f3447d9392184343fe722f87c77ce4a223b63a2a7d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4411

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d08ca4519---nogofuferu.pdf In PDF document text
    • https://artbynela.com/uploads/file/46251058347.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/906437932.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/dujaviwi.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/16557899650.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/c2f9d463045f8eae65a6e3bbeec5c7eb/xoxet.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210617/file/16239302598428.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/l26rsvdj5kcssku5ov0os1qhvt/88122323834.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5320068ef8---77686589344.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/pp4hfc8ago55r9ghav0gv1kfn5/rosuk.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607288397e347---58893498158.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/puziwobeve.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29024f4076---29391181566.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/dad319504d14a84249cfdea748a8555a/26418368300.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607003b37b203---jamodosag.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/vafuwasipazod.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/98545477304.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add3f990e0c---dikabekolojalewer.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8e6831e7a---fifegejat.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/vuruxatepulewoledogejolo.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089aa777c2d0---58841906353.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/33eb49af1327a527f84354c5a688cda5/runotamelulago.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/21067965416.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/32492670773.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a5cb92157---kunidifumerapuj.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160773d7ea346c---wizowivovuz.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/wovunulad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=can+someone+who+is+retired+be+a+cosignerPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE7 17656 bytes
SHA-256: 5c005b6e07fc40b093c1840cda542072f61d43f6bf731a86197b71d8e4b2d350